Great device for keeping track of all kinds of useful information at your place of residence! Until 10/23 (though it can go in and out of stock more than once before then) Amazon has the Control Products MarCell HS-500SL Home Monitoring System on sale for $198.72 with free shipping. That’s $50 less than most others, and best we found by $32 today.
The HS-500SL is super useful and easy to use. A plug and play design allows you to take control of monitoring with a simple account set up. After that you can walk away, and it will give you notifications on your smartphone, laptop or other device if the temperature is high or low, the humidity is up, or if the power goes out in your home, then again once it’s restored!
They have tons of plans that offer various levels of monitoring for an additional fee, and you can even tell those services when to alert you (ie if the temp reaches 60 or 90 degrees, if humidty reaches a certain percentage, etc…)